Troubleshooting Guide; Refrigeration Cycle Diagram - Heat Controller B-MMC09FA-1 Service Manual

Troubleshooting Guide

Refrigeration Cycle Diagram

1. A-MMH18FA-1
Field Piping
Gas
Field Piping
Liquid
Refrigerant Flow
Cooling
Heating
Th1: Discharge thermistor
Th2: Discharge thermistor
Th3: Outdoor temperature thermistor
Th4: Defrost thermistor
2. A-MMC24FA-1
Field Piping
Gas
Field Piping
Liquid
Refrigerant Flow
Cooling
Th1: Discharge thermistor
Th2: Discharge thermistor
Th3: Outdoor temperature thermistor
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Ø9.52
Room B
Ø9.52
Room A
Header
EEV-B
Ø6.35
Room B
Ø6.35
EEV-A
Room A
Ø9.52
Room B
Ø9.52 Strainer
Room A
Header
EEV-B
Ø6.35
Room B
Ø6.35
EEV-A
Room A
Strainer
High pressure S/W
Th1 Th2
Strainer
High pressure S/W
Th1 Th2
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Troubleshooting Guide
OUTDOOR UNIT
Th3
Heat
Exchanger
Th4
OUTDOOR UNIT
Th3
Heat
Exchanger
Th4
LGE Internal Use Only